let
  pkgs = import <nixpkgs> {};
in
pkgs.mkShell {
  buildInputs = [
    (pkgs.haskellPackages.ghcWithPackages (pkgs: with pkgs;
      [
        mtl
        cmdargs
        cryptonite   # cryptographic hash functions
        utf8-string  # could also be done with Data.Text
        HUnit
        network      # sockets
        network-info # for getting local IP address
        time
      ]))
  ];
}